DE102020109849A1 - Tail lift for vehicles - Google Patents

Abstract

The invention relates to a tail lift (100) with a platform (102), the tail lift (100) having an outer edge, a groove (110) or an angle (402, 502) extending in one direction in the outer edge, the groove (110) or the angle (402, 502) is open to the outside of the platform (102), with an in particular rod-shaped light decoupling means (302b) being arranged at least in sections in the groove (110) or in the angle (402, 502), that the light decoupling means (302b) extends in the direction.

Description

The invention relates to a tail lift with a platform that can be raised and lowered. The term “tail lift” is intended to refer to any generic device for raising and lowering a platform on a motor vehicle, for example on a truck.

With DE 20 2006 004 612 U1 a light signal device for a tail lift has been proposed, which consists of one or more lighting means which are arranged in corresponding recesses in a partial area of a lateral edge surface of a loading platform of the tail lift. This arrangement provides light exit openings through which light exits from the illuminant in a light beam or light cone. The light exit openings are complex to manufacture and allow the lateral edge surface to appear bright at certain points.

the end DE 10 2015 225 054 A1 an advantageous light border for such a tail lift is known.

The present invention is based on the object of further improving this.

This object is achieved according to the invention by a tail lift of the generic type, which is characterized in that the tail lift has an outer edge, a groove or an angle extending in one direction in the outer edge, the groove or the angle being open to the outside of the platform is, wherein an in particular rod-shaped light decoupling means is arranged in the groove or at an angle at least in sections such that the light outcoupling means extends in the direction. The light decoupling means represents a passive component that is particularly robust against mechanical stresses and weather-related influences. The tail lift is therefore particularly suitable for everyday use and is easy to manufacture. In addition, the result is an appealing, homogeneous appearance when illuminated.

Means are preferably provided which are designed to couple light for propagation of the light essentially in the direction into the light outcoupling means. Regardless of where the means is arranged on the light outcoupling means, light rays of the coupled-in light spread primarily in the direction of the light outcoupling means. Over the length of the light decoupling means, a high illuminance of the decoupled light is achieved.

In one aspect, a lighting means is provided, the lighting means being designed to couple light from the lighting means essentially in the direction directed into the light decoupling means.

The means can comprise a lens, the lens is arranged and designed in such a way that diverging light beams generated by the lighting means and striking the lens are bundled so that they run essentially parallel in the longitudinal direction behind the lens. These essentially parallel light beams are coupled into the light decoupling means. This achieves a high light intensity.

It is particularly advantageous if a lighting means is arranged on at least one end face of the light extraction means. Larger areas of the longitudinal outer edge can be particularly easily illuminated by lighting from one of the end faces.

It is particularly advantageous if a lighting means for coupling light into the light output means is arranged on both end faces of the light output means. By coupling out light, the intensity of the light decreases with the distance from the light means. By coupling in two opposite end faces of the light coupling-out means, sufficient light is coupled in so that a homogeneous appearance is achieved for very long outer edges over the entire length of the light coupling-out means.

In one aspect, it is provided that the illuminant is designed to couple light from the illuminant at an angle, in particular between 5 ° and 90 ° to the direction, directed into the light decoupling means, with deflection optics arranged at least partially in the light decoupling means being designed to spread the light of the light essentially in the direction of at least partially reflecting.

In one aspect, the means comprises an optical waveguide which is arranged between the lighting means and the light decoupling means.

It is particularly advantageous if the groove or the angle extends continuously on the outer edge. As a result, the light decoupling means extending in the direction can likewise extend continuously in the groove or at an angle.

It is particularly advantageous if the groove or the angle is continuously open to the outside of the tail lift. A rod-shaped light decoupling means can thus simply be pushed into the groove or arranged at the angle.

It is particularly advantageous if the is arranged in the groove or at an angle Lichtauskoppelmittel extends continuously in the direction. The homogeneous appearance can be achieved particularly easily by a light decoupling means extending continuously in the direction.

It is particularly advantageous if the groove or the angle has a section extending in the direction with an inner profile, in particular an inner radius, which corresponds to the outer profile, in particular the outer radius of the light decoupling means. The groove or the angle accommodate the light decoupling means with an exact fit.

It is particularly advantageous if the angle or the groove are designed as an optical element for reflecting light emerging from the light decoupling means. The light decoupling means is made of transparent or semitransparent material. The light reflected at the angle or the groove penetrates the light decoupling means and intensifies the intensity of the illumination on the open side of the groove or the angle.

It is particularly advantageous if the groove or the angle has a transverse profile extending transversely to the direction, which defines a continuously identical light exit angle in the direction for light emerging from the light decoupling means. As a result, a homogeneous appearance is simply achieved for different viewing angles.

It is particularly advantageous if the groove or the bracket is open at least in sections to at least one other outside of the tail lift, the groove or the bracket being arranged so that light emerging from the light decoupling means appears homogeneous or bright in sections at least one further outside of the tail lift leaves. As a result, the appearance of the top or the bottom of the tail lift can be influenced with the same lighting means and / or light decoupling means.

It is particularly advantageous if the light decoupling means has scattering particles which are arranged in a light guide element, in particular a plastic, a polymethyl methacrylate or quartz glass. Plastic, polymethyl methacrylate or quartz glass are particularly suitable for guiding light. The scattering particles gradually couple out light in the desired intensity in the course of the light extraction means. Light decoupling agents are particularly well suited for producing the homogeneous appearance.

It is particularly advantageous if the groove or the angle and the light decoupling means extend at least in sections along an outer edge of a point profile or an outer edge of the platform. As a result, the tip profile or the transverse outer edge of the platform also appears homogeneously bright, at least in sections, when light emerges from the light decoupling means.

A first, in particular multi-part, light output means preferably extends along a first outer edge of the tip profile, a second, in particular one-part, light output means extends along a second outer edge of the tip profile.

The tip profile can have a loading sill with an opening, the loading sill having profile surfaces in the area of the opening on both sides of the opening which extend essentially parallel to the loading sill and against each other at an angle in particular between 25 ° and 35 °, preferably of 30 ° or are inclined with respect to an optical axis by an angle in particular between 20 ° and -20 °, preferably + 15 ° or -15 °

The loading sill can have profile surfaces which are inclined with respect to the optical axis and which enclose the opening, one of the profile surfaces being inclined at an angle in particular between 40 ° and 50 °, preferably 45 ° with respect to the optical axis, the other profile surface being inclined at an angle in particular between 75 ° ° and 85 ° is preferably inclined 80 ° with respect to the optical axis.

It is particularly advantageous if the at least one illuminant is designed to flash or if at least two illuminants for the light decoupling means are designed to flash essentially synchronously. As a result, signaling is also made possible with the lighting means or with the lighting means.

It is particularly advantageous if a light source is arranged on one end face of the light extraction means and a sensor is arranged on an end face of the light extraction means opposite this end face, the sensor being designed to detect an intensity of light that reaches the sensor through the light extraction means.

It is particularly advantageous if a control is provided which is designed to detect a pivoting position of the platform and to operate the lighting means in a first operating mode in which the lighting means is continuously lit when a first pivoting position is detected, and in a second Operate operating mode in which the lamp flashes when a second pivot position is detected.

As a result, the tail lift, in particular a vehicle that has such a The tail lift has, when the tail lift is in operation and when the platform is in the driving position, it is particularly well perceived when light emerges from the lamp.

Further features, advantages and details of the invention emerge from the attached patent claims and from the drawings and the following description of preferred embodiments of the invention.

• 1 eine erste perspektivische Ansicht einer ersten erfindungsgemäßen Plattform;
• 2 eine zweite perspektivische Ansicht einer zweiten erfindungsgemäßen Plattform;
• 3 eine erste Seitenansicht einer ersten Ausgestaltung der erfindungsgemäßen Plattform in Richtung des Pfeils I oder II;
• 4 eine zweite Seitenansicht einer zweiten Ausgestaltung der erfindungsgemäßen Plattform in Richtung des Pfeils I oder II;
• 5 eine dritte Seitenansicht einer dritten Ausgestaltung der erfindungsgemäßen Plattform in Richtung des Pfeils I oder II;
• 6 eine vierte Seitenansicht einer vierten Ausgestaltung der erfindungsgemäßen Plattform in Richtung des Pfeils II;
• 7 eine Draufsicht auf die vierte Ausgestaltung der erfindungsgemäßen Plattform in Richtung des Pfeils III oder IV;
• 8 eine fünfte Seitenansicht einer Ausgestaltung eines Spitzenprofils der erfindungsgemäßen Plattform;
• 9 zeigt eine sechste Seitenansicht einer weiteren Ausgestaltung eines weiteren Spitzenprofils,
• 10 zeigt eine schematische Darstellung einer ersten Beleuchtungsanordnung für die Plattform,
• 11 zeigt eine schematische Darstellung einer zweiten Beleuchtungsanordnung für die Plattform,
• 12 zeigt eine schematische Darstellung einer dritten Beleuchtungsanordnung für die Plattform,
• 13 zeigt eine schematische Darstellung einer vierten Beleuchtungsanordnung für ein Spitzenprofil,
• 14 zeigt schematisch eine Anordnung eines Leuchtmittels und einer Umlenkoptik,
• 15 zeigt schematisch eine Anordnung eines Leuchtmittels und eines Lichtwellenleiters,
• 16 zeigt schematisch eine erste Ansicht einer Anordnung des Lichtauskoppelmittels an einer Ladekante eines Spitzenprofiles,
• 17 zeigt schematisch eine zweite Ansicht einer Anordnung des Lichtauskoppelmittels an einer Ladekante eines Spitzenprofiles,
• 18 zeigt eine Anordnung mit einer Leuchte im Spitzenprofil,
• 19 zeigt eine Anordnung mit zwei äußeren Leuchten und einer dreiteiligen Leuchte im Spitzenprofil,
• 20 zeigt schematisch Teile eines Steuergeräts
• 21 zeigt Schritte in einem Verfahren.

In the drawing shows:

• 1 a first perspective view of a first platform according to the invention;
• 2 a second perspective view of a second platform according to the invention;
• 3 a first side view of a first embodiment of the platform according to the invention in the direction of arrow I or II;
• 4th a second side view of a second embodiment of the platform according to the invention in the direction of arrow I or II;
• 5 a third side view of a third embodiment of the platform according to the invention in the direction of arrow I or II;
• 6th a fourth side view of a fourth embodiment of the platform according to the invention in the direction of arrow II;
• 7th a plan view of the fourth embodiment of the platform according to the invention in the direction of arrow III or IV;
• 8th a fifth side view of an embodiment of a tip profile of the platform according to the invention;
• 9 shows a sixth side view of a further embodiment of a further tip profile,
• 10 shows a schematic representation of a first lighting arrangement for the platform,
• 11 shows a schematic representation of a second lighting arrangement for the platform,
• 12th shows a schematic representation of a third lighting arrangement for the platform,
• 13th shows a schematic representation of a fourth lighting arrangement for a tip profile,
• 14th shows schematically an arrangement of a light source and a deflecting optics,
• 15th shows schematically an arrangement of a light source and an optical waveguide,
• 16 shows schematically a first view of an arrangement of the light decoupling means on a loading edge of a tip profile,
• 17th shows schematically a second view of an arrangement of the light decoupling means on a loading edge of a tip profile,
• 18th shows an arrangement with a lamp in the top profile,
• 19th shows an arrangement with two outer lights and a three-part light in the top profile,
• 20th shows schematically parts of a control device
• 21 shows steps in a process.

The same elements of the tail lift are denoted by the same reference numerals throughout the figures.

1 shows a first perspective view of part of a first tail lift according to the invention 100 . The first tail lift 100 assigns a platform 102 with a work surface 104 , one longitudinal outer edge each 106 on each side of the first tail lift 100 and a transverse outer edge 108 on which the longitudinal outer edges 106 connects. The first tail lift 100 also has means, not shown, for fastening the first tail lift 100 on a vehicle. Will be the first tail lift 100 Attached to the rear of a vehicle, the longitudinal outer edges extend 106 parallel to the vehicle's longitudinal axis. When attached to the side of the vehicle, the transverse outer edge extends 108 parallel to the vehicle axis.

In addition, the tail lift has 100 at the platform 102 one of the work surface 104 opposite bottom.

2 shows a second perspective view of part of a second tail lift according to the invention 200 . The second tail lift 200 also has a platform 102 with a work surface 104 , one longitudinal outer edge each 106 on each side of the second tail lift 200 and a transverse outer edge 108 on which the longitudinal outer edges 106 connects. Also the second tail lift 200 points to the platform 102 one of the work surface 104 opposite underside and means for attachment to a vehicle.

The means for fastening mentioned are for lifting, lowering and / or pivoting the platform 102 formed with respect to the vehicle.

In the longitudinal outer edge 106 and / or in the transverse outer edge 108 a groove extends in the longitudinal direction or transverse direction 110 . This is preferable continuously ie in the longitudinal or transverse direction continuously to the outside of the tail lift 100 open. Alternatively, both in the longitudinal outer edge 106 as well as in the transverse outer edge 108 an angle can be provided. This is preferably also continuous, that is to say continuously in the longitudinal direction or in the transverse direction towards the outside of the tail lift 100 open.

This means that the groove 110 or the angle in the longitudinal outer edge 106 extends in the longitudinal direction. Alternatively or additionally, the groove 110 or the angle at least in sections in the transverse outer edge 108 extend in the transverse direction.

The groove preferably extends 110 or the angle along the entire length of the respective edge. This allows a lamp to move around at least three sides of the platform 102 be arranged circumferentially. This creates a particularly attractive light border around the platform 102 achieved. It is particularly preferred if only the longitudinal axis edges 106 a groove 110 or have an angle. It is also possible for webs only at the connection points of longitudinal outer edges 106 with the transverse outer edge 108 be provided. These increase the stability of the platform 102 .

In the groove 110 or a light decoupling means is arranged at an angle in such a way that light emerging from the light decoupling means the longitudinal outer edge 106 and / or the transverse outer edge 108 makes the platform appear homogeneously bright. The light decoupling means preferably extends in the longitudinal direction or in the transverse direction, in particular continuously in the groove 110 or the angle. The light decoupling means is particularly preferably arranged circumferentially around at least three sides of the work platform.

The concept of the light border can provide in the edge area on the platform 102 Provide continuous light decoupling means that are flush with the edge profile of the platform 102 are integrated along the long side.

In contrast to the first tail lift 100 has the second tail lift 200 in an edge area of the work surface 104 openings 202 on that by the work surface 104 to the groove 110 to lead. On top of the platform 102 can be on the right and left long sides of the platform 102 also in particular rod-shaped light decoupling means can be integrated.

Alternatively or in addition to the arrangement of the openings 202 on the work surface 104 you can also do this on the in 2 underside of the platform, not shown 102 be arranged.

The groove 110 or the angles are thus at least partially to at least one further outside of the platform 102 open minded. The groove 110 or the angle is arranged in such a way that the light emerging from the light decoupling means is at least one further outside of the tail lift 100 appears homogeneous or light in sections

The groove 110 or the angles preferably have a section extending in the longitudinal direction or transverse direction with an inner profile, in particular an inner radius, which corresponds to the outer profile, in particular the outer radius of the light decoupling means.

The light decoupling means is in 1 and 2 not shown. A lighting arrangement 300 that have a light decoupling agent 302b is included in the following on the basis of the 3 until 12th described.

3-5 show, in this regard, side views of various configurations of the platform according to the invention 102 in the direction of arrow I. or II.

3 shows the lighting arrangement 300 in which a light decoupling means 302b in the groove 110 is arranged. The light decoupling means 302b is preferably in the groove 110 reset on one of the light decoupling elements 302b facing inside 306 the groove 110 arranged. As a result, the free ends of the legs protrude 304 the groove 110 via the light decoupling means 302b and thus offer the light source 302 Protection against mechanical stress.

The light decoupling means 302b exhibits scattering particles 308 on that in a light guide 310 are arranged. The light guide element 310 includes, for example, a plastic, a polymethyl methacrylate or quartz glass. The light guide element is preferably made 310 Essentially made of plastic, a polymethyl methacrylate or quartz glass in which the scattering particles are arranged.

In the light decoupling means 302b light is coupled in. The light decoupling means 302b ideally, the light is then emitted again homogeneously on the surface over the entire length. In one aspect, the light is coupled into the light guide element only on the front side by means of an LED 310 . The light guide element 310 is a plastic profile in the example. The light is ideally only coupled out on one long side of the plastic profile where the light on the platform 102 is visible. For platforms of different heights 102 can have a different length of the light decoupling means 302 be provided through which the light is to be coupled out.

4th shows two light decoupling means 302b at an angle 402 . The angle 402 preferably has two over the two light decoupling means 302b protruding free ends 404 on. Each of the two light decoupling means 302b is in this example in a respective groove 110 held.

When opening or closing the platform 102 signals this lighting arrangement 300 on the underside of the platform 102 because of the 40 ° position both backwards and to the side the dangerous situation. This allows road users who are from the side as well as from behind the opening platform 102 approach the edge of the platform 102 through lighting arrangement 300 be signaled.

Is the platform 102 Opened at the loading area level or lowered on the floor, the safety effect is also provided by the lighting arrangement 300 elevated.

Especially at night or in poor visibility, such as. B. rain, fog or snowfall, the platform is clearly visible as a potential hazard due to the illuminated and flashing edge area.

For the operator, safety is increased because the edge area of the platform 102 on the top by the lighting arrangement 300 is fully illuminated to a limited extent. The operator sees the edge of the platform 102 at any time and is optically through the lighting arrangement 300 warned before reaching the edge area.

5 shows the light decoupling means 302b at an angle 502 . The angle 502 preferably has one or two over the bulb 302 protruding free ends 504 on. This provides the protruding free ends 504 of the angle 502 the light decoupling means 302b Protection against mechanical stress.

The light decoupling means 302b facing inside 306 the groove 110 that the light decoupling means 302b to turned insides 406 of the grooves 110 , as well as the light source 302 facing inside 506 of the angle 502 are designed at least in sections to reflect light emanating from the light decoupling means 302b exit. Such from the light decoupling means 302b Exiting light is reflected and leads to an increase in the intensity of the light exit from the groove 110 or the angle 402 , 502 . For this purpose, inner surfaces are arranged, for example, at predetermined angles, in particular between -90 ° and + 90 °, in particular between -45 ° and + 45 °, preferably between -25 ° and 25 °, to an optical axis A. The optical axis A runs, for example, parallel to the transverse direction and divides the groove 110 in the longitudinal axis edge 106 into two equal halves. The angle 402 , 502 is divided into halves of equal size by the optical axis, for example. The geometry of the groove 110 or the angle 402 , 502 is selected according to the desired spacing angle.

The light decoupling means 302b is transparent or semi-transparent in one aspect. This causes the light to pass through the light decoupling means 302b reflected through.

The groove 110 or the angle 402 , 502 are designed in another aspect as an optical element for influencing the light exit. The groove 110 or the angle 402 , 502 preferably have a transverse profile of this type extending in the longitudinal direction, which in the longitudinal direction has a continuously equal light exit angle for from the illuminant 302 determines the light emitted.

The groove is advantageous 302 or are the angles 402 , 502 integral with the platform 102 educated. Alternatively, the groove 302 or the angles 402 , 502 as removable edge section elements that extend along the longitudinal or transverse outer edge of the platform 102 extend trained.

The groove extend particularly advantageously 302 or the angles 402 , 502 over the entire length or width of the platform 102 . It is particularly advantageous if the groove 302 or the angles 402 , 502 across the entire width of the platform 102 continuously to the outside of the platform 102 are open. This will facilitate both the installation of the light source 302 a homogeneous brightness distribution is achieved in a simplified as well as particularly simple manner.

The groove 110 or the angle 402 , 502 can also as in 6th shown on a transverse outer edge 602 the platform 102 be arranged with a top profile 604 is connectable.

7th shows a view in the direction of arrow III. or IV. In the example off 6th are to the work surface 104 to the in 7th openings shown 202 intended. These are continuously open up to the groove. The groove 110 runs along the underside of the platform 102 . The openings 202 extend transversely along the work surface 104 in the area of the groove 110 .

The light decoupling means 302b , is preferably rod-shaped. The light decoupling means 302b preferably extends in the groove 110 .

A corresponding view in the direction of arrow IV. Results for the case that the groove 110 through the work surface 104 runs, and the openings 202 at the bottom of the platform 102 are arranged.

In both cases, a homogeneous brightness distribution is achieved at least in one direction. It can also be provided both on the underside and in the work surface 104 a groove 110 with light decoupling means 302b to arrange.

The groove 110 or the angle 402 , 502 as well as the light decoupling means 302b can also as in 8th shown on a top profile 802 be arranged. The top profile 802 is for example as an extension of the work surface 104 formed in the longitudinal direction, preferably foldable. The tip profile preferably extends along the width of the transverse outer edge 108 .

For attachment point the outer edge of the platform 102 , preferably the transverse outer edge 108 , and the side of the tip profile facing this 802 corresponding connecting means on. Opposite the connection point is on a preferably rounded loading edge 804 of the top profile 802 the groove 110 or the angle 405 , 505 for receiving the light decoupling means 302b arranged. The loading sill 804 extends, preferably cylindrical, along a contact surface when the platform is lowered 102 rests on the floor. The groove 110 or the angle 405 , 505 is preferably on one of the loading sill 804 remote side of the tip profile 802 arranged. Preferably the groove 302 or the angle 405 , 505 section of the tip profile set back from the contact surface with respect to the ground 802 arranged. As a result, the light exit opening is when the platform is lowered 102 not in contact with the ground. This becomes the light decoupling means 302b protected.

9 shows a particularly preferred arrangement of the groove 110 in the top profile 802 . The groove 110 extends parallel to the transverse outer edge 108 in the top profile 802 . In 9 the arrangement of the loading sills is shown as an example 804 facing side of the tip profile 802 .

Additionally are in the top profile 802 openings 202 intended. At least one opening 202 is opposite the opening of the groove 110 in the top profile 802 arranged and connects the underside continuously with the groove 110 . At least one of the openings 202 is on a third side of the top profile 802 arranged and up to the groove 110 continuous. Through the opening 202 in the third side, preferably in the working position of the tail lift, the light emitting means shines 302b light emitted along the plane of the work surface 104 away.

The light decoupling device 302b is in this case preferably a round bar, which is in the tip profile 802 the platform 102 is integrated. The top profile 802 is in the example an aluminum profile at the end of the platform 102 that is also used to drive up. In the circular, front end of the tip profile 802 a hole is drilled in the center of the circular cross-section. To the front, the profile is preferably open at least in the angular range for direction indicators in the range of +/- 15 °. The open cross-section for the round rod lamp of the profile can be introduced with a form milling cutter or it can be created directly when the extruded profile is pressed

The round rod is preferably made of Plexiglas (R). The round bar has a compressive strength of 120 N / mm ² and thus about half the compressive strength of aluminum. When rolling over a weight of 2000 kg with a pallet truck, there is no damage to the light decoupling device 302b on. Should the light decoupling device 302b If you suffer damage, you can repair it by replacing the light decoupling device 302b be carried out cheaply.

The circular cross-section has a diameter of 6 mm in the example. The light source 302a for illuminating the light decoupling device 302b can in the top profile 802 be integrated. The light source 302a can have a circular cross-section, in particular 6 mm.

The light length, ie the length of the light decoupling device 302b can be less than or equal to 200 mm. The radiation therefore works without any special requirements for the material used.

The light source 302a can from an outer edge of the platform to the light decoupling device 302b be coupled.

10 shows a schematic representation of a first lighting arrangement 300 for the platform 102 . At the first lighting arrangement 300 is at one end 312 of the light decoupling means 302b a lamp 302a arranged.

For example, for the light decoupling means 302b the first lighting arrangement 300 a material is provided from which light can be extracted homogeneously up to a length of 1000 mm if at the end faces 312 an LED is arranged.

For this purpose, a material is used, for example, which is designed to pass through scattering particles 308 in the light guide element 310 , one across the face 312 to scatter coupled light so that it evenly on the surface of the light guide element 310 exit.

The light source 302a is for coupling light into the light decoupling means 302b educated. In the example is the lamp 302a a light emitting device, LED.

A one-sided, frontal coupling of light by an LED enables homogeneous light emission up to 1000 mm in length. The light decoupling means preferably has 302b an at least partially polished surface so that the light does not come out of the light decoupling means through surface defects 302b is decoupled.

11 shows a schematic representation of a second lighting arrangement 300 for the platform 102 . On the second lighting arrangement 300 is on both ends 312 of the light decoupling means 302b a lamp 302a for coupling light into the light decoupling means 302b arranged. For fiber optic cable lengths over 1000 mm, light can be coupled in at the two end faces 3123 of the light guide element 310 take place. This enables a simple, inexpensive technical solution based on the concept to surround the light border of the platform 102 to enable a tail lift.

12th shows a schematic representation of a third lighting arrangement 300 for the platform. With the third lighting arrangement 300 it is provided that on one end face 312a of the light decoupling means 302b a lamp 302a is arranged and on an end face opposite this end face 312b of the light decoupling means 302b a sensor 302c is arranged. The sensor 302c is designed to detect an intensity of light that the sensor 302c through the light decoupling means 302b achieved. In the example is the sensor 302c a photodiode.

13th shows a schematic representation of a fourth lighting arrangement 300 for a top profile 802 .

It is possible to use the entire top profile 802 to be integrated into a lighting unit for the tail lift. For example, in a longitudinal direction of the tip profile 802 between two outer areas of the tip profile 802 each with a light decoupling device 302b a central area with a light decoupling device 302b arranged. At each of these light extraction devices 302b is on one of the end faces in the example 312 one lamp each 302a arranged. The other of the front sides 312 the respective light decoupling device 302b can be made opaque. The outer areas are therefore independent of the central area of the tip profile 802 illuminable.

It is also possible to direct the light on at least one section of a circumferential surface of the light decoupling device 302b in addition to or instead of one of the end faces 312 or from both ends 312 to couple.

In the groove 110 or the angle 402 , 502 is preferably not a light source 302a integrated, which independently emits light but only the light decoupling device 302b . The illuminant is preferably 302a on the front of the light decoupling device 302 outside the groove 110 or out of angle 402 , 502 arranged.

The light guide 310 can also be used without scattering particles 308 are provided.

In principle, it is also possible to couple the light into the light guide from below and not from the front.

When light is guided through the light guide device 310 can with a cover of the light decoupling means 302a the light is reflected on its surface and through the light guide device 310 to get redirected.

This increases the light intensity at an end of the light guide device opposite the LED 310 . This increased light intensity can be caused by the sensor 302c , for example the photodiode, can be measured and the deviations from a reference value are determined.

For this purpose, for example, a control of the tail lift is required 100 provided with the sensor 302c connected is. In the example, the control is also used to control the light source 302a or the light source 302a trained and connected to them.

It can be provided that a light intensity of the illuminant is adapted as a function of the measured light intensity 302a to provide an ambient light level.

With a central arrangement of the sensor 302c , for example the photodiode, on the light decoupling device 302b and with coupling at the front by two lamps 302a , for example by two LEDs, it can be provided that each light source 302a is regulated to the same light intensity. For example, only one of the LEDs can be switched on, the light intensity through the central sensor 302c measured and the LED adjusted to the setpoint. In the central arrangement of the sensor 302c can be provided the sensor 302c in the light decoupling device 302b to arrange, or two light decoupling devices 302b provide and the sensor 302c between one of the end faces of one of the light output devices 302b and one of the end faces of the other light output devices 302 to arrange. This ensures that when light is coupled in on both sides, the light intensity from the two different LEDs is identical, even if the LEDs were different.

This physical effect can also be used to prevent the operator from entering the light decoupling device 302b to signal and thus to give feedback that he is on the edge of the platform 102 is located.

Thus, the light decoupling device 302b can also be used as a sensor in addition to their optical safety effect.

A change in light intensity by covering the light decoupling device 302b with one foot or one hand, for example, is about 10%. This is one through the sensor 302c measurable effect. Further examples for three different scenarios are given below. The examples are based on a measurement in which an LED light with a power of 9.4mW in a 1000 mm long light decoupling device 302b coupled. The light decoupling device 302b is in the example a Plexiglas (R) profile. The light decoupling device 302b is in the groove in the example 110 held. Without one over the cover of the groove 110 outgoing cover of the light decoupling device 302b In the example, an intensity of 3.5µW at the sensor 302c measured.

• Intensitätsänderung bei leichtem Druck:
  • - am Anfang -12,3%
  • - in der Mitte -8,2%
  • - am Ende -4,9%
  • - Mittelwert -8,5%

When the light decoupling device is covered 302b there is a change in the measured intensity depending on the point at which the cover takes place:

• Change in intensity with light pressure:
  • - at the beginning -12.3%
  • - in the middle -8.2%
  • - at the end -4.9%
  • - mean value -8.5%

• - am Anfang -13,3%
• - in der Mitte -10,3%
• - am Ende -8,7%
• - Mittelwert -10,8%

Change in intensity at medium pressure:

• - at the beginning -13.3%
• - in the middle -10.3%
• - at the end -8.7%
• - mean value -10.8%

• - am Anfang -20,4%
• - in der Mitte -13,0%
• - am Ende -10,6%
• - Mittelwert -14,7%

Change in intensity with strong pressure:

• - at the beginning -20.4%
• - in the middle -13.0%
• - at the end -10.6%
• - mean value -14.7%

The light source 302a can light up continuously over time and / or be designed to flash. This is the light source 302a for example with the control of the tail lift 100 tied together.

The control is preferably designed to recognize a pivot position of the platform and the lighting means 302a to operate in a first operating mode in which the illuminant 302a Glows continuously over time when a first pivot position is detected, and can be operated in a second operating mode in which the illuminant 302a flashes when a second swivel position is detected.

A third operating mode in which the light source 302a is continuously switched off over time, can also be provided.

The illuminant is preferably 302a by the control depending on a state of the tail lift 100 , especially the lifting, lowering or pivoting position of the platform 102 controlled.

The illuminant is particularly preferred 302a in a first pivot position of the platform 102 operated continuously glowing.

The illuminant is particularly preferred 302a in a second pivot position of the platform 102 flashing operated.

The platform is in the first position 102 preferably arranged vertically with respect to a loading area of a vehicle.

The platform is in the second position 102 preferably arranged horizontally with respect to the loading area.

The light source is controlled by the controller 302a preferably in the first position continuously, and when the platform 102 leaves the first position, operated flashing.

The light source 302a is for example when swiveling the platform 102 turned on in a working position to light or flash continuously. The light source is turned on, for example, when the platform is pivoted 102 switched off to a driving position, or switched from flashing to continuous lighting.

It is particularly advantageous to adjust the intensity of the lighting as a function of the position. The illuminant is preferably 302 operated with a light intensity between 50 and 250 cd if the lamp 302a lights continuously. The illuminant is preferably 302a operated with a light intensity between 50 and 250 cd if the lamp 302a flashes.

The light source 302a is preferably through the electrical system of the vehicle on which the tail lift 100 attached is energized. There is preferably a power connection to the control of the tail lift 100 intended.

It can also be connected to the vehicle electrical system, preferably to the control of the flashing lights, of the vehicle on which the tail lift is located 100 is arranged, be provided. This connection is preferably configured, the lighting means 302a when actuating the hazard warning lights to be controlled flashing.

If two bulbs 302a for the light decoupling means 302b are provided, the control is preferably designed the two lighting means 302a to be controlled together. The two bulbs 302a are preferably designed to light or flash essentially synchronously.

The light source 302a is a means which is designed to emit light for propagation of the light essentially in the longitudinal direction into the light decoupling means 302b to couple. Other embodiments of the means are described below with reference to FIG 14th and 15th described.

This in 14th means shown schematically comprises a lighting means 302a ' . The light source 302a ' is designed to emit light from the illuminant 302a ' directed at an angle to the longitudinal direction in the light decoupling means 302b to couple. The angle is preferably between 5 ° and 90 °. In the example shown, the angle α = 90 °, ie perpendicular to a surface of the light decoupling means 302b . Another angle can be set depending on an arrangement of the means on the tail lift, for example 35 ° or 45 °.

The means also comprises an at least partially in the light decoupling means 302b arranged deflection optics 302d which is designed to at least partially reflect the light for propagation of the light essentially in the longitudinal direction. The deflection optics 302d is for example a mirror. From the lamp 302a ' emerging light rays are, for example, essentially perpendicular to the longitudinal direction of the light decoupling means 302b in the light decoupling means 302b coupled. These light rays are reflected, for example, by the mirror at an angle of 45 °, so that reflected light rays are essentially in the longitudinal direction of the light decoupling means 302b get lost. In 14th a resulting angle β = 90 ° between an incident and a reflected light beam is shown. An angle γ for the arrangement of the deflecting optics 302d is determined by the angle α for the coupling and the angle β for the coupling out. In the in 14th The example shown is the angle γ = 45 ° with respect to the longitudinal direction of the light decoupling means 302b . The deflection optics 302d can also be arranged at other angles γ.

This in 15th means shown schematically comprises an optical waveguide 302e includes that between the illuminant 302a ' and the light decoupling means 302b is arranged. The light source 302a ' can be arranged in any way. The light is in this case through the fiber optic cable 302e , for example via glass fiber, and then on the front side into the light decoupling means 302b coupled. Instead of the in 15th End coupling shown can also be coupling via another surface of the light decoupling means 302b , for example essentially vertically and with the deflecting optics 302d take place.

The light decoupling means 302b can also replace flashing lights that are used for direction indicators. This is exemplified below for Plexiglas elements in the tip profile 802 based on 16 and 17th explained. The illuminant and the light decoupling means 302b fulfills all requirements for a direction indicator. These are defined, for example, in Regulation No. 6 of the United Nations Economic Commission for Europe (UNECE) - Uniform Conditions for the Approval of Direction Indicators for Motor Vehicles and their Trailers.

In 16 is a preferred arrangement of the light decoupling means 302b and the groove 110 at the loading edge 804 of the top profile 802 shown. The groove 110 extends in the example parallel to the transverse outer edge in the tip profile 802 . The light decoupling means 302b extends in the example parallel to the transverse outer edge in the groove 110 . The groove 110 includes an opening 806 in the loading sill 804 , which in the example are parallel to the transverse outer edge in the loading sill 804 extends. The loading sill 804 points in the area of the opening 806 Profiled surfaces on both sides 808 , which in the example extend parallel to the transverse outer edge.

Preferably one of the profile surfaces is 808 with respect to an optical axis 810 inclined by an angle α of + 15 ° in the example. The other of the profile surfaces 808 is preferably opposite the optical axis 810 by an angle β of im Example -15 ° inclined. Other angles are also possible. The profile surfaces 808 are inclined to each other by 30 ° in this example. For light that comes out of the light decoupling means 302b exits, it is achieved in a constructive manner that a radiation angle α of +/- 15 ° in the example is ensured. The opening 806 is preferably so in the sill 804 arranged oriented that light then with respect to a direction of travel of a vehicle on which the tail lift 100 is arranged, can radiate to the rear when the sill 804 rests on the floor.

The opening 806 is preferably so in the sill 804 oriented arranged that the optical axis 810 essentially parallel to a loading area 812 of the top profile 802 is arranged.

The opening 806 is preferably so in the sill 804 arranged that light emanating from the opening 806 emerges, with respect to the extension along the transverse outer edge on one side of the optical axis 810 with a radiation angle γ in the example of 45 ° and on one of these with respect to the extension along the transverse outer edge other side of the optical axis with a radiation angle δ in the example of 80 ° with respect to the optical axis 810 radiates. This is in 17th shown as an example. In the example there are two openings 806 and two light decoupling means 302b provided, which are arranged spaced from one another with respect to the extent along the transverse outer edge. For this purpose, in the example, the radiation angle with respect to the optical axis is corresponding 810 inclined profile surfaces 814 intended. The facing, ie inner profile surfaces 814 are in the example corresponding to the radiation angle γ with respect to the optical axis 810 inclined. The other profile surfaces 814 are in the example with the radiation angle δ with respect to the optical axis 810 inclined. Other angles are also possible.

The illuminant and the light decoupling means 302b are matched to one another and arranged to one another in such a way that a light intensity of the from the light decoupling means 302b through the opening 806 With a light output of 50-500 cd, a light color of yellow or amber with a flashing frequency of 1.5 Hz and a beam angle of +/- 15 ° to the rear, 80 ° to the outside and 45 ° to the inside is achieved.

18th shows an arrangement with a lamp in the top profile 802 in which the light decoupling means 302b along the loading edge 804 extends. The light decoupling means 302b extends in the in 18th example shown along the entire loading sill 804 . In the example, the luminaire comprises at least one light source 302a from the light into the light decoupling means 302b can be coupled. This creates a continuous luminaire. In the light decoupling means 302b is light as described above from the at least one lamp 302a (not shown) coupled.

The at least one illuminant is preferred 302 controlled, essentially synchronous with other light sources 302 same tail lift 100 to light up or to flash, in particular synchronously with at least one other light source 302a for lighting in a longitudinal area of the platform 102 , ie an area of the platform 102 extending in the longitudinal direction.

19th shows an arrangement with two outer lights and a three-part light in the top profile 802 . The three-part lamp is arranged between the outer lamps.

The three-part luminaire with a top profile 802 comprises a first light decoupling means 302b-1 , a second light decoupling means 302b-2 and a third light extraction means 302b-3 . These extend in the transverse direction along the loading sill 804 in the top profile 802 . The first light decoupling means 302b-1 represents a central part of the three-part lamp. The second light decoupling means 302b-2 and the third light decoupling means 302b-3 can represent an outer part of the three-part luminaire. Instead of a three-part lamp, a two-part or multi-part lamp can also be provided. The first light decoupling means 302b-1 is in particular centered between the second light decoupling means 302b-2 and the third light decoupling means 302b-3 arranged. As described above, light from at least one illuminant is emitted into this light decoupling means 302a (not shown) especially at connection points 1901 coupled. The first light decoupling means 302b-1 the second light decoupling means 302b-2 and the third light decoupling means 302b-3 can at the connection points 1901 in particular be arranged in alignment with one another in the transverse direction or flush with one another in the transverse direction. At the connection points 1901 A reflective element or an element opaque to light can be arranged at the end of at least one of the light decoupling means. This is the first light decoupling means 302b-1 independent of the second light decoupling means 302b-2 and the third light decoupling means 302b-3 illuminable.

The two outer lights in the top profile 802 are optional. The two outer lights each include a light decoupling means. A fourth light decoupling means 302b-4 and a fifth light extraction means 302b-5 are in the example on opposite sides of the tip profile in the transverse direction 802 arranged and extend in the longitudinal direction. The fourth Light decoupling means 302b-4 extends in the example from the second light decoupling means 302b-2 starting from the loading sill 804 path. The fourth light decoupling means 302b-4 may by a reflective or an opaque first spacer means 1902 from the second light decoupling means 302b-2 be spaced apart. The fifth light decoupling means 302b-5 extends in the example from the third light decoupling means 302b-3 starting from the loading sill 804 path. The fifth light decoupling means 302b-5 may by a reflective or an opaque second spacer means 1903 from the third light decoupling means 302b-3 be spaced apart. The first spacer 1902 or the second spacing means 1903 can through part of the top profile 802 be educated. This is the second light decoupling means 302b-2 independent fourth light decoupling means 302b-4 illuminable. This is the third light decoupling means 302b-2 independent fifth light decoupling means 302b-5 illuminable.

20th shows schematically parts of a control device 2000 for the tail lift 100 . The control unit 2000 comprises in the example at least one processor and a memory for instructions, which are executed on the processor at least one control signal for at least one lamp is determined. In the example there is a large number of light sources 302a via at least one control line 2002 for the at least one control signal with the control unit 2000 tied together.

When controlling at least one of the lamps 302a In particular, there are various options for the luminaires described with the control signal or with several control signals. The control unit 2000 can be designed to control the three-part light and the two outer lights so that the two outer lights flash simultaneously with the outer part of the three-part light and / or alternately with the middle part of the three-part light. The outer lights and / or the outer part of the three-part light can also be activated to flash, with the middle part of the three-part light being activated to shine continuously, in particular while the outer part is activated to flash.

The control unit 2000 can be designed for the tail lift 100 depending on one of at least one sensor 302c detected intensity of light an operating mode for the tail lift 100 to determine. The control device is preferred 2000 designed to perform the control described above as a function of the change in light intensity. For example, is the control unit 2000 designed to execute the control for one or more of the three different scenarios described above.

A method of operating the tail lift 100 provides that in one step S1 it is checked whether the platform 102 is arranged in the first position or in the second position.

In a subsequent step S2 there will be at least one on the tail lift 100 arranged illuminant or at least two on the tail lift 100 arranged illuminants controlled. For example, the at least one lighting means or the at least two lighting means are dependent on the state of the tail lift 100 , especially the lifting, lowering or pivoting position of the platform 102 either switched off or flashing or permanently illuminated.

For example, at least two lighting means, which are arranged on the tail lift, are controlled to blink essentially synchronously with one another or alternately with one another or to light up permanently. The method can provide for the at least two lighting means to be controlled while at least one other lighting means arranged on the tail lift is flashing, flashing synchronously with or alternately with it, or lighting up continuously during this time.

For example, at least one lamp is in the first pivot position of the platform 102 operated continuously glowing. For example, the at least one lamp is in the second pivot position of the platform 102 flashing operated.

Additionally or alternatively, the method can provide that depending on the sensor 302c detected intensity of light the operating mode for the tail lift 100 is determined. For example, stepping on the edge of the platform is dependent on the detected intensity of light 102 signals. For example, stepping on the edge of the platform 102 signals being of an operating mode in which a from the sensor 302c monitored light decoupling means 302b is operated continuously luminous with at least one lamp, is switched into an operating mode in which the light decoupling means 302b with which at least one lamp is operated flashing.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 202006004612 U1 [0002]
• DE 102015225054 A1 [0003]

Claims (20)

Tail lift (100) with a platform (102), characterized in that the tail lift (100) has an outer edge, a groove (110) or an angle (402, 502) extending in one direction in the outer edge, the groove ( 110) or the angle (402, 502) is open to the outside of the platform (102), wherein in the groove (110) or in the angle (402, 502) an in particular rod-shaped light decoupling means (302b) is arranged at least in sections so that the light decoupling means (302b) extends in the direction. Tail lift (100) Claim 1 , characterized in that means (302a; 302a ', 302d; 302a', 302e) are provided which are designed to couple light for propagation of the light essentially in the direction into the light decoupling means (302b). Tail lift (100) according to one of the preceding claims, characterized in that a lighting means (302a) is provided, the lighting means (302a) being designed to direct light from the lighting means (302a) essentially in the direction into the light decoupling means (302b) to couple. Tail lift (100) Claim 3 , characterized in that the lighting means (302a) is arranged on an end face of the light decoupling means (302b). Tail lift (100) according to one of the Claims 3 or 4th , characterized in that a lamp (302a) for coupling light into the light decoupling means (302b) is arranged on both end faces of the light decoupling means (302b). Tail lift (100) according to one of the Claims 1 or 2 , characterized in that a lighting means (302a ') is provided, the lighting means (302a') being designed to direct light from the lighting means (302a ') into the light decoupling means (302b) at an angle in particular between 5 ° and 90 ° to the longitudinal direction ), wherein an at least partially arranged in the light decoupling means (302b) deflecting optics (302d) is designed to reflect the light for a propagation of the light substantially in the direction at least partially. Tail lift (100) according to one of the Claims 3 until 6th , characterized in that the means (302a ', 302e) comprises an optical waveguide (302e) which is arranged between the lighting means (302a') and the light decoupling means (302b). Tail lift (100) according to one of the preceding claims, characterized in that the groove (110) or the angle (402, 502) has a section extending in the direction with an inner profile, in particular an inner radius, which corresponds to the outer profile, in particular the outer radius of the light decoupling means (302b) corresponds. Tail lift (100) according to one of the preceding claims, characterized in that the angle (402, 502) or the groove (110) is designed as an optical element for reflecting light emerging from the light decoupling means (302b). The tail lift (100) according to one of the preceding claims, characterized in that the groove (110) or the angle (402, 502) has a transverse profile transversely to the direction, which in the direction has a continuously identical light exit angle for the light output means (302b) exiting Light sets. The tail lift (100) according to one of the preceding claims, characterized in that the light decoupling means (302b) has scattering particles which are arranged in a light guide element, in particular a plastic, a polymethyl methacrylate or quartz glass. The tail lift (100) according to one of the preceding claims, characterized in that the groove (110) or the angle (402, 502) and the light decoupling means (302b) extend at least in sections along an outer edge of a tip profile (802) for the tail lift (100) or an outer edge of the platform (102). Tail lift (100) Claim 12 , characterized in that a first, in particular multi-part, light outcoupling means (302b-1, 302b-2, 302b-3) extends along a first outer edge of the tip profile (802), a second, in particular one-piece light outcoupling means (302b-4; 302b-5) extends along a second outer edge of the tip profile (802). Tail lift (100) Claim 12 or 13th , characterized in that the tip profile (802) has a loading edge (804) with an opening (806), the loading edge (804) having profile surfaces (808) in the region of the opening (806) on both sides of the opening (806), which extend essentially parallel to the loading sill (804) and against each other at an angle in particular between 25 ° and 35 °, preferably 30 ° or with respect to an optical axis (810) by an angle (α, β) in particular between 20 ° and -20 ° are preferably inclined by + 15 ° or -15 ° Tail lift (100) Claim 14 , characterized in that the loading edge (804) is inclined with respect to the optical axis (810) Has profile surfaces (814) which enclose the opening (806), wherein one of the profile surfaces (814) is inclined at an angle (γ), in particular between 40 ° and 50 °, preferably 45 ° with respect to the optical axis (810), the other Profile surface (814) is inclined at an angle (δ) in particular between 75 ° and 85 °, preferably 80 ° with respect to the optical axis (810). The tail lift (100) according to one of the preceding claims, characterized in that a lighting means (302a) is arranged on one end of the light decoupling means (302b) and a sensor (302c) is arranged on an end face of the light decoupling means (302a) opposite this end face, wherein the sensor (302c) is designed to detect an intensity of light which reaches the sensor (302c) through the light decoupling means (302b). Control device (2000) for a tail lift (100) according to one of the preceding claims, characterized in that the control device (2000) is designed to control at least two lighting means (302a, 302a '), in particular while at least one other lighting means (302a) is flashing, in the Essentially to and / or to each other synchronously or alternately to flash or to light up permanently. Control unit (2000) for a tail lift (100) Claim 16 , characterized in that the control device (2000) is designed to determine an operating mode for the tail lift (100) as a function of an intensity of light detected by at least one sensor (302c). Method for operating a tail lift (100), characterized in that at least two lighting means (302a, 302a ') arranged on a tail lift (100) according to one of the preceding claims are controlled (S2), in particular while at least one other lamp is on the tail lift (100). arranged light source (302a) flashes, to flash essentially synchronously with one another or alternately to one another or to light up permanently. Method for operating a tail lift (100), characterized in that, depending on an intensity of light, which is emitted by at least one of a light decoupling means (302b) of a tail lift (100) Claim 16 arranged sensor (302c) is detected (S1), an operating mode for the tail lift (100) is determined (S2).

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